Differential amplifier with improved dynamic range

摘要

A differential amplifier has first and second transistors whose bases respectively receive first and second voltage signals. The collectors of the first and second npn transistors are commonly connected to a power source terminal respectively through resistors. The emitters of the first and second npn transistors are grounded through a constant current source. The differential amplifier further has first and second pnp transistors in a common-base configuration. The collectors of the first and second npn transistors are connected to the emitters of the first and second pnp transistors.